Characterization of the non-isothermal viscous flow and thermal stability of amorphous Zr-Al-Ni-Cu alloys with a wide supercooled liquid region

The thermal stability and viscous flow behavior of amorphous Zr65Al8Ni27−xCux (x= 12, 17 and 22) ribbons were examined by using differential scanning calorimetry and thermomechanical analysis. It was observed that the viscosity decreases with increasing temperature until the first steady-state viscous flow temperature is reached and above this temperature the viscosity depends on both the composition and applied stress.